I believe those photos are actually a cyclone, Cyclone Narelle, which is off the north-west coast.

Nope, that was a mere precursor to the main show

"BOM Regional Manager of Climate Services Glenn Cook said the dust storm was not directly related to Tropical Cyclone Narelle because the centre of the cyclone was hundreds of kilometres off."

The above snippet came from news.com.au and, from the stats they were throwing around, Cyclone Narelle was still around 36 hours away from making landfall. I do love the Aussie's knack for general understatement; further on in the article

Nearly every time I see a post that I can reply to, I do so and by the time I have typed and sent the reply it has moved about 5 places down the list and there are five other replies So I haven't noticed this quietness. Remember when you are awake the vast majority of APUGers who are in N America are asleep for a lot of your waking hours or possibly at work